bitcoin already shows its power to the global economy last year.2017 was the golden time for bitcoin.in my thinking its just the starting of bitcoin.now in 2018 it will reach on a higher price that never gone before.global investors are get involving with bitcoin.lots of companies are going to accepting bitcoin as their payment system. world economy is going to make a great movement this year by the help of bitcoin community.every single seconds bitcoin community is rising.maybe bitcoin is going to rule the global economy in near future.so finally 2018 is going to be a historical year for bitcoin holders.